High-performance MXene based capacitive humidity sensor is fabricated by a drop casting method. The material is characterized by Fourier Transform Infrared Spectrometry (FTIR), Energy Dispersive X-ray Spectroscopy (EDX), Scanning Electron Microscopy (SEM), and X-ray Diffraction (XRD). The fabricated capacitive humidity sensor was tested at various frequencies (100 Hz−1 MHz) in a broad relative humidity (RH) detection range (13–97%). The capacitive sensitivity of MXene increased to 3400% at 90% RH and lower frequency (100 Hz) whereas, at the same % RH and high frequencies such as 100 kHz, 250 kHz, and 1 MHz, the sensitivity decreased to 13.5%, 8%, and 3.9% respectively. A rapid capacitive response/recovery time (1.11/0.65 s) recorded at lower frequency which is comparatively shorter than that at higher frequency (3.8/1.02 s). The 2-dimensional (2D) structure of MXene enables the sensor to detect minute RH variation of 1%. These features allow the MXene based sensor to monitor human respiration and physical condition by displaying specific patterns.

基于 MXene 的高性能电容式湿度传感器采用滴铸法制造。该材料通过傅里叶变换红外光谱 (FTIR)、能量色散 X 射线光谱 (EDX)、扫描电子显微镜 (SEM) 和 X 射线衍射 (XRD) 进行表征。制造的电容式湿度传感器在较宽的相对湿度 (RH) 检测范围 (13–97%) 内以各种频率 (100 Hz-1 MHz) 进行了测试。MXene 的电容灵敏度在 90% RH 和较低频率（100 Hz）下增加到 3400%，而在相同 % RH 和高频（如 100 kHz、250 kHz 和 1 MHz）下，灵敏度下降到 13.5%、8 % 和 3.9%。在较低频率下记录的快速电容响应/恢复时间 (1.11/0.65 s) 比在较高频率 (3.8/1.02 s) 下记录的时间短。MXene 的二维 (2D) 结构使传感器能够检测到 1% 的微小 RH 变化。这些功能允许基于 MXene 的传感器通过显示特定模式来监测人体呼吸和身体状况。